I almost got my red oak to burnable MC in a single season. Bought 2 "cords" ($175/cord that was actually 3/4 cord - not so bad) back in March to supplement my sporadic scrounges - it was a nice mix of red oak, sugar maple, black birch, cherry, ash & white birch that had been cut & split some months prior. Stacked everything up and top-covered until this past weekend. Compulsively checked MC as I was bringing wood into the basement. Black birch, ash, white birch, cherry were all in great shape 14-16%. Oak and sugar maple were marginal, hanging out at 18-23%. I'm fortunate that I don't need to burn every stick of wood I have on hand, so I made the executive decision to restack these pieces for next year, which came to a little over 1/2 cord. We had a very dry & sunny summer, but pretty high humidity throughout - I think top-covering + good sun & circulation really are just a winning combo...well, almost.